I don’t know why it took them so long to do this, but Google has finally added an easy way to insert page numbers into documents in Google Docs. Now you can insert page numbers into the header or footer of your pages. To do this just open the “insert” drop-down menu and select page number. You can also now insert a page count into (“4 of 23” for example) the header of your pages. You can find the directions for that here.